Optical lens



FIG. 1 is a perspective view of a first embodiment of an optical lens showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right-side view thereof;

FIG. 7 is a left-side view thereof; and,

FIG. 8 is a perspective view of a second embodiment of an optical lens thereof.

The broken lines in the drawings depict portions of the optical lens that form no part of the claimed design. 

CLAIM The ornamental design for an optical lens, as shown and described. 